摘要
直升机拖曳在海洋探测以及军事应用等方面具有重要意义。论文基于Qt4编程环境,开发了考虑气液两相的拖曳系统仿真软件,用于计算拖曳系统的空间位置、形态及张力分布,模拟收、放缆的过程。考虑收放缆的速度,采用有限差分法求解气、液耦合的拖曳系统运动方程,建立拖缆运动模型。首先对长度为41.4m和43.4 m的拖缆以不同速度进行拖曳试验,将拖缆的首端张力、空气中缆的长度和出水角度的仿真结果和试验值对比,其误差较小,验证了仿真软件的准确性。然后选取长度为16 m的拖缆,分别对距水面高度为0 m和2m的工况进行收缆和放缆的模拟,实时输出拖缆形态以及受力,并对拖缆的首端张力进行分析和比较。结果表明,随着收放缆时间的增加,放缆时拖缆的首端张力增大,收缆时拖缆的首端张力减小。当缆长相等时,收缆对应的张力大于放缆对应的张力。仿真结果对拖曳系统在收、放缆过程中拖曳参数的设置以及拖曳系统的设计具有参考价值。
Helicopter towing is of great significance in ocean exploration and military applications.Based on the Qt4 programming environment,a simulation software of the towing system considering gas-liquid two phase medium is developed to calculate the spatial configuration and tension distribution of the towed system and simulate retraction and release process of the cable.Motion equation of the towing system is solved with the finite difference method.Firstly,the towed cables with lengths of 41.4 m and 43.4 m are tested at different speeds.The test and simulation results of the tension at the first end,the length of the cable in the air and the outlet angle are compared,and it is found that the error is small,indicating the accuracy of the simulation software.Then select the 16-meter-long towed cable,respectively,the water surface height of 0 m and 2 m working conditions for receiving and releasing simulation,real-time output towed cable shape and force,and towed cable tension analysis and comparison.The simulation results show that the tension at the first end of the towed cable increases with the increase of the cable retraction time.When the cable is closed,the tension at the first end of the towing cable decreases.And when the cable length is equal,the tension corresponding to the receiving cable is greater than that corresponding to the discharging cable.The simulation results have reference value for the setting of drag parameters and the design of drag system in the process of receiving and discharging cables of drag system.
作者
邓卫华
向晗
冯大奎
张志国
DENG Weihua;XIANG Han;FENG Dakui;ZHANG Zhiguo(School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Hubei Key Laboratory of Hydrodynamics of Ships and Marine Engineering,Wuhan 430074,China)
出处
《中国造船》
EI
CSCD
北大核心
2022年第3期249-258,共10页
Shipbuilding of China
基金
中国国家科学基金、YEQISUN联合基金(U2141228)。
关键词
直升机拖曳
收放缆
气液两相
有限差分法
helicopter towing
retract and release of cables
gas liquid two phase
finite difference method
